Multiple Choice Questions on The number of solutions of the equation 12 cos3 x 7 cos2x 4 cos x 9 is ........ for Mathematics (11th and 12th) Preparation

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Multiple Choice Questions

The number of solutions of the equation 12 cos3 x 7 cos2x 4 cos x 9 is ........

Mathematics (11th) Chapter - 10
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    The number of solutions of the equation 12 cos3 x-7 cos2x +4 cos x= 9 is

    0

    Incorrect Answer

    2

    Incorrect Answer

    infinite 

    Correct Answer

    none of these 

    Incorrect Answer
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    Explanation:

    infinite

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